Well point core



WELL. POINT CORE Filed May 9, 1951 H. C. HETTINGER Feb. 3, 1953 PatentedFeb. 3, 1953 UNITED STATES PATENT OFFICE 4 Claims.

This invention relates to a novel well point core.

It is generally known in this art that by the use of the customary wellpoint embedded in a layer of water-bearing material, such as sand andsilt, the usual screened perforations or inlet openings in the tubularwall portion of the well point will admit some silt and line particlestherethru, which particles become lodged within said wall portion andgradually pile up from the lower tip end against the inside of thewalland its perforations; and that after continued use of such wellpoint the perforations will eventually become covered and the well pointfinally rendered ineiective for the .proper flow of water therethru. Itfurthermore appears that even where such well point may have beenequipped heretofore with an inner tube for conducting the water upwardstherethru, as indicated by the patent to Berky, No. 1,004,528, suchinner tube had its inlet openings positioned a distance upward from itslower end and away from the well point tip, thus still permitting sandand silt to get lodged upon such bottom tip, in-

side the tubular wall of the well point, and thus gradually diminish theiiow of water therethru.

It is the essential object of this invention to provide means forovercoming such deficiency in the customary type of well point, byproviding an improved tubular insert or core arranged for mounting`within such type of well point, and so constructed as to direct theflow of liquid, that enters thru said perforations and travels betweensaid core and the wall of the well point, to flow with a rapid surgeinwards upon the upper face of said tip and therefrom to surge upwardsWithin said tubular core, in such a manner as to prevent any silt fromgetting started to lodge within the well point thus equipped with thisnovel core.

A more particular object of this invention is to provide such animproved tubular core which is equipped with improved inlet means at itslower end, all constructed and arranged so as to direct the flow of theincoming liquid in a spiral or swirling stream over said tip andtherefrom deflect it with a rapid surge upwards thru this tubular core.

These and various other objects and advantages are attained with thisinvention, as will become apparent from the following description, takenin connection with the accompanying drawing wherein the invention isshown in its preferred form, it being evident that other arrangementsand modifications may be resorted to 2 for accomplishing the purposes ofthis invention.

In the drawing:

Fig. 1 is an elevational view of the tubular core comprising thisinvention, being shown partly broken away.

Fig. 2 is an elevational view showing a known forni of well pointcontaining this core mounted in its operative position therein, bothshown partly broken away.

Fig. 3 is a slightly enlarged cross-sectional view of the well point andcore therein., taken on line 3 3 of Fig. 2.

Fig. 4 is a partial view showing the lower end 'oi a modified form ofcore, containing spaced legs instead of the curved wings.

In the drawing this invention is shown in its preferred form, comprisinga tubular core Il which is arranged to be readily mountable in a knowntype of well point I2 for use therewith. Such a well point I2 is shownherein as including the tubular wall or casing I3 which contains thecustomary perforations or inlet openings I4 having screening means I5mounted thereacross; and this tubular wall I3 contains on its lower endthe solid tip I3, the top face I1 of which forms the bottom of the wallI3'. The upper end of this wall I3 comprises the threaded end part I8adapted for connection with the usual well tubing thereabove, as is allwell known.

This improved core I I as illustrated herein comprises a tubular mainportion or body 2| which is imperforate and is of such a shape and sizeas to t within the tubular wall I3 of the well point I2, and to bespaced slightly inwardly from the interior surface of said wall. Thiscore comprises upper spacing means 22 and lower spacing means 23,extending outwardly from the upper part and from the lower part of saidbody 2 I, respectively, so as to space said body a slight distanceinward from the interior of the wall I3 and thereby provide a fluidspace or chamber 24, in the shape of a thin cylindrical chamber betweensaid body and wall.

This core II is preferably constructed in the form of one unitarymember, and. the upper spacing means 22 is arranged as an outwardlyextending flange, adapted to provide a driving t within the upper end ofthe wall I3 of the well point. Said ange means 22 may also be brazed orwelded into said upper end of the well point; and solder 25 may be addedto this flange means 22 to provide a permanent huid-tight connectionwith said wall.

The spacing means 23 at the lower end of this tubular body 2| isarranged in the form of curved wings, and it is preferably provided bysplitting the tube a short distance upward from the bottom end andbending the several split end parts into the shape of curved wings,substantially like propeller blades; and in such a form as to direct theliquid and all substance, that enters thru the perforations and comesdown thru chamber 24, to flow and surge in a swirling and spiral streamover` the top face Vi on said tip i5, and thence up within said tubularcore, during the pumping operation. These curved blades or wings 23 arethus seated upon said face ll within the bottom end of saidy wall i3,and support the core in its properly spaced relation at this end, andthey will impart a fast circular twisting or swirling motion to thefluid traveling and impinging upon said face I1 in its travel up thrusaid tubular core.

It should also be noted that with the use of this tubular core mountedin such a well point, the well point will operate effectively whenimmersed in shallow water in the well; and that even if the water standsonly up to the upper parts of these short bottom wings 23 of this core,f

the pump equipped with this well point and core therein ,can stilloperate efficiently.

Fig. 4 discloses a modiiied form of core H', wherewith the lower spacingmeans 23 are proe vided in the yform of legs positioned in spacedrelation around the lower end ci the tubular body 2l', and serve as thespacing and supporting means for the core in the well point, as morelfully described and claimed in my co-pending application for Core forWell Point, Serial No.

121,079, led October 13, 1949.

Iiclaim:

1. A core for awell point including a lower tip and :a tubular wallthereabove providedwith inlet'openings, said core comp-rising a tubularbody fitting loosely within said `tubular wall, means at the upper endof said body to mount it spaced inward of and huid-tight within saidwall, and a plurality .of spaced apart elements at the lower kend ofsaid body extending downwardly and outwardly thereof, to provide a flowchamber between said 'body and wall and to support the body upon 'thebottom of said chamber, said elements 'being positioned below said inletvopenings vand arranged at a slant downwardly to cause the `substanceflowing from said chamber between said elements, during the pumpingoperation, to flow 4 with a swirling motion over said lower tip, in itstravel upwards in said body.

2. A core for a well point including a lower tip and a tubular wallthereabove provided with screened inlet perforations, said corecomprising an imperforate tubular body fitting loosely within said wall,means on the upper end of said body to mount it spaced inward of andfluid-tight within said wall, and a plurality of propeller-like curvedwings extending downwardly and outwardly from the lower end of saidbody, to space said end from the wall and the tip and provide a owchamber between said body and wall, said perforations being positionedabove said wings and said tip, thereby causing the substance that iiowsthru said chamber, during the pumping operation, to travel with aswirling motion from said wings over said tip and thence -upward in thebody, to prevent lodging of silt and substance upon said tip.

3. The subject matter set forth in claim 2, and wherein the coreconsists of one unitary member, its upper Aend means comprises anoutwardly curved flange, and the wings are in the form of bladesintegral with and curved outwardly and .downwardly from the lower end ofthe body.

4. vIn a well point containing a lower tip and va perforated tubularwall above the tip, ancre-com.- prising an imperforate tubular bodymounted withinsaidwall, spacingmeans `around the lupper end lof saidbodysecuring it-spaced inward of and duid-tight wthin said wall, bladesintegral on the lower end of said body, extending curved -downwardly andoutwardly at said end and ,bearing upon Vthe top face of said tip, theperforations-in said wall being positioned abovesaid ,blades and s aidtip, causing the substance that ows tghru said wall during the pumping`opera-tion to be ldirected 'by said blades Witha swirling motion oversaid tip and upinsaid body.

HENRY 4C. HETTINGER.

REFERENCES CITED `The following references are of record in the file ofthis patent:

UNlTED STATES 'PATENTS ANumber Name Date 130,447 Sternberg Aug. 1.3,1872 1,094,528 Berky Sept, 26, 1,9171 .1,195,073 Nussbaum, Jr. Aug. 15,11,916l

